Kazuko Ukawa

Efficient removal of N-benzyloxycarbonyl group by a ‘push–pull’ mechanism using thioanisole–trifluoroacetic acid, exemplified by a synthesis of Met-enkephalin

Yoshiaki Kiso, Kazuko Ukawa, Tadashi Akita · Journal of the Chemical Society Chemical Communications · 1980 · 80 citations

Natural Sciences, Chemistry, Medicinal Chemistry +12

Efficient removal of protecting groups by a 'push-pull' mechanism. II. Deprotection of O-benzyltyrosine with a thioanisole-trifluoroacetic acid system without O-to-C rearrangements.

Yoshiaki Kiso, Kazuko Ukawa, Shizuo Nakamura et al. · Chemical and Pharmaceutical Bulletin · 1980 · 64 citations · Full text

Life Sciences, Biochemistry, Bioorthogonal Chemistry +5

Deprotection of O-methyltyrosine by a ‘push–pull’ mechanism using the thioanisole–trifluoromethanesulphonic acid system. Application to the convenient synthesis of a potent N-methylenkephalin derivative

Yoshiaki Kiso, Shizuo Nakamura, Kaoru Ito et al. · Journal of the Chemical Society Chemical Communications · 1979 · 42 citations

Pharmacy, Medicinal Chemistry, Pharmacology +7

Efficient deprotection of N^G-tosylarginine with a thioanisole–trifluoromethanesulphonic acid system

Yoshiaki Kiso, Masahiko Satomi, Kazuko Ukawa et al. · Journal of the Chemical Society Chemical Communications · 1980 · 24 citations

Natural Sciences, Biochemistry, Chemistry +6